The 18-hole “Irv Warren” course at the Irv Warren Course facility in Waterloo, Iowa features 6,194 yards of golf from the longest tees for a par of 72. The course rating is 69.5 and it has a slope rating of 117 on Bent grass. Irv Warren golf course opened in 1908. Nate Lubs, PGA manages the course as the Golf Professional.